Key and replace lock cores without dismantling the entire door handle. Choose these if you want to use your own compatible small format interchangeable lock core. They are UL Listed for three-hour fire doors. Once the outside handle is locked with the button on the inside handle, turn the inside handle to release the lock or unlock it with a key from the outside.

Backset distance is the distance from the door’s edge to the center of the handle's mounting hole. Latch bolt projection is the length the latch bolt extends from the door's edge.